Network Security and Cryptography is primarily designed to serve as a textbook for undergraduate students of Computer Science and Engineering. The book provides an in-depth coverage of all important concepts pertaining to cryptography and network security. Beginning with an introduction to cyber attacks and the defence measures, strategies, and techniques that need to be followed to combat them, the book goes on to explore several crucial topics such as basics of cryptography, secret key and public key cryptography, cryptographic hash, key management, authentication, IPSec, wireless LAN security, vulnerabilities, malware, access control, firewalls, intrusion prevention and detection, RFIDs, electronic payment, and web services and security. Written in a clear